-LRB- CNN -RRB- -- Egypt 's Tahrir Square was supposed to be a scene of celebration on Sunday , as Cairo marked the election of a new president .

But it was n't a joyous night for everyone : At least five women were sexually assaulted by mobs in the square , according to Egypt 's campaign group I Saw Harassment .

In India , meanwhile , politicians have downplayed rape , with one recently saying : `` Boys will be boys . ''

And of course , war has long been connected with the rape of women , men , boys and girls .

Actress and activist Angelina Jolie is lending star power to the `` End Sexual Violence in Conflict '' conference organized by Britain 's Foreign Office in London this week , highlighting a global problem .

Worldwide : One in three women worldwide has experienced sexual abuse or violence ; 150 million girls under the age of 18 have been sexually assaulted . Half were under 16 at the time .

Democratic Republic of Congo : Nearly two out of three women -LRB- 64 % -RRB- say their first sexual experience was assault .

Kenya : It 's estimated that one in three women suffered sexual violence in childhood . -LRB- One-fifth of men are estimated to have been victims of sexual violence as children . -RRB-

Bosnia-Herzegovina : Between 20,000 and 50,000 women were raped during the war of 1992-1995 .

Burundi : Three out of four men -LRB- 77 % -RRB- say some women `` ask to be raped '' by the way they dress and behave -- and 95 % of women agree .

Rwanda : An estimated 250,000 to 500,000 women survived rape during the 1994 genocide .

Central African Republic : Just under 10 % of women and girls report having been raped .

United States : An estimated 340,000 women are raped or sexually assaulted every year . Eighty-three percent of girls aged 12 to 16 in state-run schools have experienced sexual harassment at school .

Sources : United Nations , Government of Kenya , Tearfund , Association of Widows of Genocide -LRB- Rwanda -RRB- , War Child , U.S. Justice Department ,

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NEW : An estimated 340,000 U.S. women are raped or sexually assaulted every year

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One in three women worldwide has experienced sexual abuse or violence

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Nearly two out of three women in Congo say their first sexual experience was assault

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Between 20,000 and 50,000 women were raped in Bosnia in the 1990s war